Vehicle

Abstract

The invention relates to a vehicle. The vehicle comprises a vehicle key, a control circuit and an electronic fuel delivery pump. The vehicle key comprises a power-on signal end and a starting signal end; the control circuit is connected among the power-on signal end, the starting signal end and the electronic fuel delivery pump; the electronic fuel delivery pump runs through the control circuit under the condition that the vehicle key is powered on and a starting signal is not triggered, continues to run under the condition that the vehicle key is powered on and the starting signal is triggered, and stops running under the condition that the vehicle key is powered on and the starting signal is cut off. According to the technical scheme, electronic fuel delivery pump control based on vehicle power-on and vehicle starting can be achieved, the electronic fuel delivery pump can assist an engine to achieve vehicle starting through corresponding functions, and then the reliability and stability of vehicle starting are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a vehicle. Background Art

[0002] The vehicle's engine fuel system can realize the fuel supply of the engine. In the fuel supply scheme of the engine fuel system, the low-pressure oil circuit can adopt a positive pressure system, a negative pressure system or a positive and negative pressure integrated system. The positive pressure system is realized by an electronic oil pump to deliver oil, the negative pressure system is realized by a low-pressure oil pump to deliver oil, and the positive and negative pressure integrated system is realized by an electronic oil pump and a low-pressure oil pump together to deliver oil. In addition, the electronic oil pump can also be used for degassing of the low-pressure oil circuit.

[0003] Therefore, it is necessary to control the operating state of the electronic fuel pump of the vehicle so that the electronic fuel pump and the low-pressure fuel pump can cooperate to supply fuel to the vehicle engine. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a vehicle, which includes: a vehicle key, a control circuit and an electronic fuel pump; the vehicle key includes a power-on signal terminal and a start signal terminal; the control circuit is connected between the power-on signal terminal, the start signal terminal and the electronic fuel pump; the electronic fuel pump operates via the control circuit when the vehicle key is powered on and the start signal is not triggered, continues to operate when the vehicle key is powered on and the start signal is triggered, and stops operating when the vehicle key is powered on and the start signal is disconnected.

[0005] Optionally, the control circuit includes a first relay, a second relay and a third relay; the control end of the first relay is connected to the power-on signal end, the first relay is used to close when the vehicle key is powered on and the start signal is not triggered and when the vehicle key is powered on and the start signal is triggered, and is used to disconnect when the vehicle key is powered on and the start signal is disconnected; the control end of the second relay is connected to the start signal end, the switch end of the second relay is connected to the power-on signal end, and is connected to the control end of the first relay, the second relay is used to close when the vehicle key is powered on and the start signal is triggered, and is used to remain closed by self-locking when the vehicle key is powered on and the start signal is disconnected; the control end of the third relay is connected to the start signal end, the switch end of the third relay is connected to the switch end of the second relay, the third relay is used to close when the vehicle key triggers the start signal, and is used to disconnect when the start signal is disconnected.

[0006] Optionally, the first relay is a normally open relay, the second relay is a double-switch relay, and the third relay is a single-switch relay.

[0007] Optionally, the first relay includes: a first control end, a second control end and a first switch, the first control end is connected to the power-on signal end, the second control end is connected to the switch end of the second relay, the first end of the first switch is connected to the power supply, and the second end of the first switch is connected to the electronic oil pump.

[0008] Optionally, the second relay includes: a third control end, a fourth control end, a second switch and a third switch, the third control end is connected to the start signal end, and the fourth control end is grounded; the common end of the second switch is connected to the second control end, the normally open end of the second switch is connected to the switch end of the third relay, and the normally closed end of the second switch is grounded; the common end of the third switch is connected to the power-on signal end, and the normally open end of the third switch is connected to the start signal end.

[0009] Optionally, the third relay includes: a fifth control terminal, a sixth control terminal and a fourth switch; the fifth control terminal is connected to the start signal terminal, and the sixth control terminal is grounded; the normally open terminal of the fourth switch is grounded, and the common terminal of the fourth switch is connected to the normally open terminal of the second switch.

[0010] Optionally, the vehicle further includes a timer, which is used to measure the power-on time of the power-on signal end when the vehicle key is powered on and the start signal is not triggered; the electronic fuel pump includes a controller, which is connected to the timer, and is used to control the electronic fuel pump to stop running when the power-on time exceeds a preset power-on time.

[0011] Optionally, the timer is also used to measure the start time of the start signal end when the vehicle key is powered on and the start signal is triggered; the controller is also used to control the electronic fuel pump to stop running when the start time exceeds a preset start time.

[0012] Optionally, the vehicle also includes: an oil storage device connected to one end of the electronic oil pump; an engine connected to the other end of the electronic oil pump through an oil circuit; when the electronic oil pump is running, the electronic oil pump is used to transport the fuel in the oil storage device to the engine through the oil circuit.

[0013] Optionally, the vehicle further comprises: an oil filter device, wherein the oil filter device is connected to the oil storage device, and the electronic oil pump is integrated on the oil filter device.

[0014] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by configuring a control circuit for the electronic fuel pump, the control circuit is connected between the power-on signal end of the vehicle key, the start signal end of the vehicle key and the electronic fuel pump, and through the control circuit, the electronic fuel pump can be operated when the vehicle key is powered on and the start signal is not triggered, continue to operate when the vehicle key is powered on and the start signal is triggered, and stop operating when the vehicle key is powered on and the start signal is disconnected. Thus, the electronic fuel pump can operate during the vehicle startup process and stop operating after the vehicle startup is completed, thereby realizing electronic fuel pump control based on vehicle power-on and vehicle startup, so that the electronic fuel pump can assist the engine to start the vehicle through corresponding functions, for example: pressurizing or exhausting the engine's oil circuit, thereby improving the reliability and stability of vehicle startup.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0017] Figure 1 is a schematic diagram of a positive pressure oil supply system according to an exemplary embodiment.

[0018] Figure 2 is a schematic diagram of a negative pressure oil supply system according to an exemplary embodiment.

[0019] Figure 3 It is a schematic diagram of a positive and negative pressure integrated oil supply system according to an exemplary embodiment.

[0020] Figure 4 is a block diagram of a vehicle according to an exemplary embodiment.

[0021] Figure 5 is a block diagram of a control circuit according to an exemplary embodiment.

[0022] Figure 6 is a schematic diagram of a first relay according to an exemplary embodiment.

[0023] Figure 7 is a schematic diagram of a second relay according to an exemplary embodiment.

[0024] Figure 8 is a schematic diagram of a third relay according to an exemplary embodiment.

[0025] Fig. 9 is a circuit structure diagram of a control circuit according to an exemplary embodiment. DETAILED DESCRIPTION

[0026] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0027] As global energy resources become scarce and the environment gradually deteriorates, people's environmental awareness continues to increase. Energy conservation and emission reduction are being promoted worldwide to achieve the dual control goals of carbon emissions. Internal combustion engine technology can achieve high-quality development and promote green and low-carbon economic and social development. Internal combustion engine technology is also constantly being optimized and upgraded. The low-pressure oil circuit of the fuel system can serve as a key transportation channel for providing engine fuel.

[0028] With the development of hybrid technology, the layout space of the vehicle's oil circuit has been reduced due to the layout of products such as batteries and motors, resulting in the gradual lengthening of the vehicle's fuel pipeline, and the complexity of the pipeline direction, which has become more demanding for the pressure drop of the low-pressure oil circuit. Therefore, the control method and strategy of the low-pressure oil circuit have also been gradually optimized and improved in the process of internal combustion engine technology development, in order to solve the problems of high rail pressure of the high-pressure oil circuit of the fuel system and low fuel supply efficiency of the low-pressure oil circuit caused by unstable oil supply of the low-pressure oil circuit, as well as the problem of difficult starting caused by too long oil circuits and loose sealing.

[0029] In order to facilitate understanding of the technical solution of the disclosed embodiment, a brief introduction to the engine fuel system applied to a vehicle is given below.

[0030] At present, the mainstream fuel supply scheme of the low-pressure oil circuit of the engine fuel system is divided into two working modes: a positive pressure system and a negative pressure system, and also involves a working mode combining the positive pressure system and the negative pressure system.

[0031] Figure 1 is a schematic diagram of a positive pressure oil supply system according to an exemplary embodiment. Figure 1 As shown, the positive pressure fuel supply system arranges an electronic fuel pump inside the fuel tank, and presses the fuel from the fuel tank to the pump chamber of the high-pressure fuel pump by introducing positive pressure into the oil circuit, thereby realizing fuel supply to the low-pressure oil circuit.

[0032] Figure 2 is a schematic diagram of a negative pressure oil supply system according to an exemplary embodiment. Figure 2 As shown, a low-pressure oil pump is integrated on the high-pressure oil pump camshaft. When the engine is running, the oil pump camshaft drives the mechanical oil pump to work, so that the fuel is sucked from the fuel tank to the oil pump, and then pressed into the pump cavity of the high-pressure oil pump to meet the low-pressure oil circuit oil supply requirements.

[0033] In addition to the above two types of fuel supply systems, in non-road large-scale engineering machinery and medium and heavy-duty truck scenarios, the positive pressure fuel supply system and the negative pressure fuel supply system can be integrated to form a positive and negative pressure integrated fuel supply system.

[0034] Figure 3 is a schematic diagram of a positive and negative pressure integrated oil supply system according to an exemplary embodiment. Figure 3 As shown, the low-pressure oil circuit adopts a negative pressure system as a whole, and an electronic oil pump is integrated on the diesel filter. During the vehicle startup process, the electronic oil pump sets a fixed running time for degassing (eliminating air blockage in the pipeline) and oil supply, so as to solve the problem that the oil circuit is long or the seal is not tight. After standing still, gas may gather into air columns in the pipeline, causing difficulty in starting the vehicle overnight or stalling during driving.

[0035] Therefore, for the electronic oil pump, its role in the low-pressure oil circuit can be: to eliminate air resistance in the low-pressure oil circuit and to supply oil before the engine is started.

[0036] Regarding the positive pressure fuel supply system structure of the low-pressure oil circuit, since the fuel supply pressure of the low-pressure oil circuit is 4-6 bar (abs), the materials used in the entire pipeline must be pressure-resistant to avoid fuel leakage. Compared with the negative pressure pump, the overall material cost is higher. In addition, after the electronic fuel pump is integrated into the fuel tank, the electronic fuel pump needs to work for a long time, and when the oil level in the fuel tank is low, the fuel pump may be insufficiently lubricated, resulting in a relatively high failure rate of the electronic fuel pump.

[0037] Regarding the negative pressure fuel supply system structure of the low-pressure oil circuit, when starting for the first time, since the low-pressure oil circuit is not full of fuel, it is necessary to manually press the diesel filter hand pump to exhaust the oil circuit. In addition, if the low-pressure oil circuit is too long, it may cause difficulty in overnight starting and cold starting.

[0038] Regarding the positive and negative pressure integrated fuel supply system structure of the low-pressure oil circuit, an electronic fuel pump is integrated on the diesel filter. The integrated electronic fuel pump can effectively solve the problems of oil circuit exhaust and starting difficulties during engine start-up. However, due to the fixed operating time of the electronic fuel pump, the electronic fuel pump may continue to work after the engine is started. In this working mode, the electronic fuel pump and the mechanical fuel pump jointly provide a pressure source, which may cause pressure superposition, resulting in unstable and high oil inlet pressure in the low-pressure oil circuit, which may eventually cause unstable rail pressure and error reporting in the high-pressure system.

[0039] Based on this, the embodiment of the present disclosure provides a technical solution, which introduces the power-on signal and the start signal of the vehicle key, controls the electronic oil pump through the control circuit, and controls the electronic oil pump to run before the engine is started to pressurize and exhaust the low-pressure oil circuit so that the engine can start smoothly. After the engine is started, the electronic oil pump is controlled to stop running to avoid the problem of vehicle system error caused by the high pressure of the high-pressure oil circuit rail pressure, thereby improving the reliability and stability of vehicle starting.

[0040] The application scenarios of this technical solution can be Figure 3 The positive and negative pressure integrated oil supply system shown, that is, for vehicles, can be used Figure 3 The positive and negative pressure integrated oil supply system.

[0041] Figure 4 is a block diagram of a vehicle 400 according to an exemplary embodiment. Figure 4 As shown, the vehicle includes: a vehicle key 401 , a control circuit 402 and an electronic fuel pump 403 .

[0042] The vehicle key 401 may include a power-on signal terminal and a start signal terminal, and the control circuit 402 is connected between the power-on signal terminal, the start signal terminal and the electronic oil pump 403 .

[0043] Through the control circuit 402, the electronic fuel pump 403 runs when the vehicle key 401 is powered on and the start signal is not triggered, continues to run when the vehicle key 401 is powered on and the start signal is triggered, and stops running when the vehicle key 401 is powered on and the start signal is disconnected.

[0044] In some embodiments, when the vehicle key 401 is powered on (i.e., the vehicle 400 is powered on), the power-on signal terminal outputs a power-on signal. When the vehicle key 401 triggers a start signal (i.e., the vehicle 400 triggers a start signal), the start signal terminal outputs a start signal. And, when the vehicle key 401 disconnects the start signal (i.e., the vehicle 400 is started), the start signal terminal stops outputting the start signal. When the vehicle key 401 is powered off (i.e., the vehicle 400 is powered off), the power-on signal terminal stops outputting the power-on signal.

[0045] The vehicle key 401 can be understood as a vehicle control device, which can include multiple control gears, such as power on, start and lock, etc. For details, please refer to the mature vehicle key technology in the field, which will not be introduced in detail here.

[0046] Regarding the control circuit 402, it is possible to implement the operation control of the electronic oil pump 403. In order to reduce the cost and control difficulty of the control circuit 402, the control circuit 402 can be implemented by a relay.

[0047] Figure 5 is a block diagram of a control circuit 402 according to an exemplary embodiment. Figure 5 As shown, the control circuit 402 includes: a first relay KA1, a second relay KA2 and a third relay KA3.

[0048] Among them, the control end of the first relay KA1 is connected to the power-on signal end, and the first relay KA1 is used to close when the vehicle key 401 is powered on and the start signal is not triggered and when the vehicle key 401 is powered on and the start signal is triggered, and to disconnect when the vehicle key 401 is powered on and the start signal is disconnected.

[0049] The control end of the second relay KA2 is connected to the start signal end, the switch end of the second relay KA2 is connected to the power-on signal end, and is connected to the control end of the first relay KA1. The second relay KA2 is used to close when the vehicle key 401 is powered on and the start signal is triggered, and is used to remain closed by self-locking when the vehicle key 401 is powered on and the start signal is disconnected.

[0050] The control end of the third relay KA3 is connected to the start signal end, the switch end of the third relay KA3 is connected to the switch end of the second relay KA2, and the third relay KA3 is used to close when the vehicle key 401 triggers the start signal, and to disconnect when the start signal is disconnected.

[0051] In some embodiments, the operation control of the electronic oil pump 403 is achieved by controlling the opening or closing of the first relay KA1, the second relay KA2 and the third relay KA3 respectively.

[0052] In some embodiments, if neither the power-on signal terminal nor the start signal terminal outputs a corresponding signal, the first relay KA1 , the second relay KA2 , and the third relay KA3 are all in a disconnected state, and the electronic oil pump 403 does not operate.

[0053] In some embodiments, if the power-on signal terminal outputs a power-on signal, and the start signal terminal does not output a start signal, it means that the vehicle 400 is powered on but the generator is not started. Then, the first relay KA1 is closed, the second relay KA2 and the third relay KA3 are both opened, and the electronic fuel pump 403 is running.

[0054] In some embodiments, if the power-on signal terminal outputs a power-on signal first and then the start signal terminal outputs a start signal, it means that the vehicle 400 is powered on and the generator is started. Then, the first relay KA1, the second relay KA2 and the third relay KA3 are all closed, and the electronic fuel pump 403 remains in operation.

[0055] It can be understood that the power-on signal is a continuous signal, while the start signal is a non-continuous signal. For example, after the engine is successfully started, the vehicle key 401 is released and the start signal is disconnected.

[0056] Therefore, after the second relay KA2 is switched from the open state to the closed state, it can be kept closed by self-locking under the action of the power-on signal; the third relay KA1 is disconnected due to the disconnection of the start signal.

[0057] Furthermore, for the first relay KA1, after the start signal is disconnected, although the power-on signal is not disconnected, due to the self-locking of the second relay KA2 and the disconnection of the third relay KA3, the control end of the first relay KA1 will not be powered. As a result, the first relay KA1 will be disconnected because the control end cannot be powered.

[0058] Therefore, when the vehicle 400 is started, the start signal terminal disconnects the start signal, the first relay KA1 is disconnected, the second relay KA2 remains closed by self-locking, the third relay KA3 is disconnected, and the electronic fuel pump 403 stops running.

[0059] It can be seen from the introduction of the above embodiments that based on the first relay KA1, the second relay KA2 and the third relay KA3, the circuit control logic to be implemented is: when the first relay KA1 is in a closed state, and the second relay KA2 and the third relay KA3 are both in an open state, the electronic fuel pump 403 operates. When the first relay KA1 is in a closed state, and the second relay KA2 and the third relay KA3 are both in a closed state, the electronic fuel pump 403 keeps running. When the first relay KA1 is in an open state, the second relay KA2 is in a self-locking closed state, and the third relay KA3 is in an open state, the electronic fuel pump 403 stops running.

[0060] Therefore, in order to realize the above control logic, the first relay KA1 may be a normally open relay, the second relay KA2 may be a double switch relay, and the third relay KA3 may be a single switch relay.

[0061] Regarding the normally open relay, the switch inside the relay is closed when the relay is energized and is opened when the power is off. Therefore, when the relay is closed, the first relay KA1 can connect the circuit between the electronic fuel pump 403 and the electrical signal end of the vehicle 400, allowing the electronic fuel pump 403 to operate.

[0062] As for the dual-switch relay, the relay has two switches built in, and both switches can be controlled by the control terminal signal of the relay. Moreover, after the relay is closed, if there is a switch connected to the power-on signal, the relay will enter a self-locking state where it remains closed, and the relay will not open until the power-on signal disappears.

[0063] Regarding the single switch type relay, the relay has a built-in switch, and the switch can be controlled by a control terminal signal of the relay.

[0064] Furthermore, specific working modes of the first relay KA1 , the second relay KA2 and the third relay KA3 are introduced in subsequent embodiments.

[0065] Figure 6 is a schematic diagram of a first relay KA1 according to an exemplary embodiment. Figure 6 As shown, the first relay KA1 includes: a first control terminal C1, a second control terminal C2 and a first switch.

[0066] The first control terminal C1 is connected to the power-on signal terminal, the second control terminal C2 is connected to the switch terminal of the second relay KA2, the first terminal L1 of the first switch is connected to the power supply, and the second terminal L2 of the first switch is connected to the electronic oil pump 403.

[0067] In some embodiments, the power supply of the low-pressure oil circuit may be a 12V or 24V power supply, which is not limited here.

[0068] Figure 7 is a schematic diagram of a second relay KA2 according to an exemplary embodiment. Figure 7 As shown, the second relay KA2 includes: a third control terminal C3, a fourth control terminal C4, a second switch and a third switch, the third control terminal C3 is connected to the start signal terminal, the fourth control terminal C4 is grounded, the common terminal G1 of the second switch is connected to the first relay KA1, the normally open terminal K1 of the second switch is connected to the switch terminal of the third relay KA3, the normally closed terminal B1 of the second switch is grounded, the common terminal G2 of the third switch is connected to the power-on signal terminal, the normally open terminal K2 of the third switch is connected to the start signal terminal, and the normally closed terminal B2 of the third switch is not connected to other circuit components.

[0069] In some embodiments, the second switch and the third switch include a common terminal, a normally open terminal, and a normally closed terminal, respectively. When the relay coil is not energized (disconnected), the common terminal and the normally closed terminal are in a closed state, and the common terminal and the normally open terminal are in an open state. When the relay coil is energized (closed), the common terminal and the normally closed terminal are in an open state, and the common terminal and the normally open terminal are in a closed state.

[0070] Figure 8is a schematic diagram of a third relay KA3 according to an exemplary embodiment. Figure 8 As shown, the third relay KA3 includes: a fifth control terminal C5, a sixth control terminal C6 and a fourth switch. The fifth control terminal C5 is connected to the start signal terminal, the sixth control terminal C6 is grounded, the normally open terminal K3 of the fourth switch is grounded, the common terminal G3 of the fourth switch is connected to the switch terminal of the second relay KA2, and the normally closed terminal B3 of the fourth switch is not connected to other circuit components.

[0071] In some embodiments, the fourth switch includes a common terminal, a normally open terminal, and a normally closed terminal. When the relay coil is not powered (disconnected), the common terminal and the normally open terminal are in a closed state, and the common terminal and the normally closed terminal are in an open state. When the relay coil is powered (closed), the common terminal and the normally open terminal are in an open state, and the common terminal and the normally closed terminal are in a closed state.

[0072] Fig. 9 is a circuit structure diagram of a control circuit 402 according to an exemplary embodiment. Fig. 9 As shown, the first relay KA1 includes: a first control terminal C1, a second control terminal C2 and a first switch, the first control terminal C1 is connected to the power-on signal terminal, the first terminal L1 of the first switch is connected to the power supply, and the second terminal L2 of the first switch is connected to the electronic oil pump 403.

[0073] The second relay KA2 includes: a third control terminal C3, a fourth control terminal C4, a second switch and a third switch, the third control terminal C3 is connected to the start signal terminal, the fourth control terminal C4 is grounded, the common terminal G1 of the second switch is connected to the second control signal terminal C2, the normally closed terminal B1 of the second switch is grounded, the common terminal G2 of the third switch is connected to the power-on signal terminal, and the normally open terminal K2 of the third switch is connected to the start signal terminal.

[0074] The third relay KA3 includes: a fifth control terminal C5, a sixth control terminal C6 and a fourth switch, the fifth control terminal C5 is connected to the start signal terminal, the sixth control terminal C6 is grounded, the normally open terminal K3 of the fourth switch is grounded, and the common terminal G3 of the fourth switch is connected to the normally open terminal K1 of the second switch.

[0075] Regarding the working principle of each relay, if the control end of each relay inputs a corresponding signal, the state of the switch inside the relay changes, thereby changing the state of the relay. In addition, the relay involves two control ends, one of which inputs a power-on signal, and the other control end is grounded, which is regarded as an input power-on signal.

[0076] For example, for the first relay KA1, if the control end of the first relay KA1 does not input a power-on signal, the first switch of the first relay KA1 is in an open state, and the first relay KA1 is regarded as being in an open state. If the control end of the first relay KA1 inputs a power-on signal, the first switch of the first relay KA1 is closed, indicating that the first relay KA1 is in a closed state.

[0077] For example, for the second relay KA2, if the control end of the second relay KA2 does not input a start signal, then the common end G1 of the second switch of the second relay KA2 is connected to the normally closed end B1 of the second switch. Also, the common end G2 of the third switch of the second relay KA2 is connected to the normally closed end B2 of the third switch, indicating that the second relay KA2 is in an open state. If the control end of the second relay KA2 inputs a start signal, then the common end G1 of the second switch of the second relay KA2 is switched from being connected to the normally closed end B1 of the second switch to being connected to the normally open end K1 of the second switch. Also, the common end G2 of the third switch of the second relay KA2 is switched from being connected to the normally closed end B2 of the third switch to being connected to the normally open end K2 of the third switch, indicating that the second relay KA2 is in a closed state.

[0078] In addition, the second relay KA2 is a double-controlled relay. After the second relay KA2 is switched to the closed state, if one of the switches introduces a power-on signal, the second relay KA2 will self-lock and remain in the closed state. The self-locking state can be understood as: when the common terminal G2 of the third switch is connected to the power-on signal, the common terminal G2 of the third switch is always connected to the normally open terminal K2 of the third switch, and the common terminal G1 of the second switch is always connected to the normally open terminal K1 of the second switch.

[0079] Furthermore, even if the start signal input to the control end of the second relay KA2 is disconnected, since the second relay KA2 enters a self-locking state, the common end G2 of the third switch and the normally-open end K2 of the third switch can always remain connected, and the common end G1 of the second switch can always remain connected to the normally-open end K1 of the second switch, so that the closed state of the second relay KA2 will not change.

[0080] For example, for the third relay KA3, if the control end of the third relay KA3 does not input a start signal, the common end G3 of the fourth switch is connected to the normally closed end B3 of the fourth switch, and the third relay KA3 is considered to be in an open state. If the control end of the third relay KA3 inputs a start signal, the common end G3 of the fourth switch is switched from being connected to the normally closed end B3 of the fourth switch to being connected to the normally open end K3 of the fourth switch, and the third relay KA3 is considered to be in a closed state.

[0081] based on Fig. 9The circuit structure shown, the control logic of the electronic oil pump 403 may include: If the power-on signal is connected (which can be understood as Fig. 9 The switch corresponding to the power-on signal is closed), the control end of the first relay KA1 inputs the power-on signal, the first relay KA1 is closed, so that the electronic oil pump 403 is connected to the +12 / 24V voltage, and the electronic oil pump 403 starts to run.

[0082] If the start signal is input, the control end of the second relay KA2 inputs the start signal, the second relay KA2 is closed, and the control end of the third relay KA3 inputs the start signal, the third relay KA3 is closed. In combination with the above working principle, the common end G1 of the second switch is connected to the normally open end K1 of the second switch, the common end G2 of the third switch is connected to the normally open end K2 of the third switch, and the common end G3 of the fourth switch is connected to the normally open end K3 of the fourth switch, so that the first control end C1 and the second control end C2 of the first relay KA1 keep inputting the power-on signal, the first relay KA1 keeps in the closed state, and thus, the electronic oil pump 403 also keeps in the running state.

[0083] In addition, combined with the introduction of the aforementioned working principle, for the second relay KA2, since the common terminal G2 of the third switch is connected to the normally-open terminal K2 of the third switch, the third switch is connected to the power-on signal, and the second relay KA2 enters a self-locking state and can remain closed as long as the power-on signal is not disconnected.

[0084] If the start signal is disconnected and the power-on signal is not disconnected, the second relay KA2 remains closed due to entering a self-locking state, and the control end of the third relay KA3 no longer inputs a start signal, so the third relay KA3 switches from closed to open.

[0085] Moreover, when the second relay KA2 is self-locked and the third relay KA3 is disconnected, the corresponding circuit connection relationship is: the second control terminal C2 of the first relay KA1 is connected to the common terminal G1 of the second switch of the second relay KA2, the common terminal G1 of the second switch is connected to the normally open terminal K1 of the second switch, the normally open terminal K1 of the second switch is connected to the common terminal G3 of the fourth switch of the third relay KA3, the common terminal G3 of the fourth switch is connected to the normally closed terminal B1 of the fourth switch, and the normally closed terminal B1 of the fourth switch is not connected to any components.

[0086] Since the normally closed end B1 of the fourth switch is not connected to any component, the circuit connection relationship will prevent the second control end C2 of the first relay KA1 from being energized, and the first relay KA1 cannot continue to be energized. Then, even if the power-on signal is not disconnected, the self-locking of the second relay KA2 and the disconnection of the third relay KA3 will cause the control end of the first relay KA1 to be unable to be energized, thereby disconnecting the first relay KA1 and causing the electronic oil pump 403 to stop running.

[0087] If the power-on signal of the vehicle 400 is disconnected, the second relay KA2 is unlocked, the second relay KA2 is disconnected, and the entire control circuit 402 returns to its original state (ie, all three relays are in the disconnected state), and can wait for the next signal connection.

[0088] Thus, the control circuit 402 can realize: when the vehicle 400 is powered on and before the engine is started, the electronic oil pump 403 is operated to pressurize and exhaust the low-pressure oil circuit so that the engine can be started smoothly. After the engine is started, the electronic oil pump 403 is turned off in time to avoid the high-pressure oil circuit rail pressure surge, which causes the vehicle 400 system to report an error.

[0089] Furthermore, in the control circuit 402, there is no need to introduce other additional controllers, and only a relay is needed to control the electronic oil pump 403, so the overall cost is low.

[0090] Therefore, through the technical solution of the embodiment of the present disclosure, the operation state of the electronic fuel pump 403 can be reliably and stably controlled based on the power-on signal of the vehicle 400 and the start signal of the vehicle 400, so that the electronic fuel pump 403 can more reliably and stably realize its corresponding functions, such as pressurizing or exhausting the low-pressure oil circuit, thereby improving the operating reliability and stability of the engine. In addition, the control cost of the electronic fuel pump 403 can also be reduced.

[0091] In some embodiments, the vehicle 400 may further include: a timer. The timer is used to measure the power-on time of the power-on signal terminal when the vehicle key 401 is powered on and the start signal is not triggered.

[0092] Correspondingly, the electronic oil pump 403 may further include a controller, which is an internal controller of the electronic oil pump 403 . The controller is connected to a timer, and the timer can transmit the power-on time to the controller.

[0093] Therefore, the controller is used to control the electronic oil pump 403 to stop running when the power-on time exceeds the preset power-on time.

[0094] In some embodiments, the preset power-on time can be configured according to different application scenarios, for example, it can be 30S.

[0095] Through this implementation, when the vehicle key 401 is powered on and no start signal is triggered within a period of time, the electronic oil pump 403 can be promptly controlled to stop running, thereby reducing energy consumption.

[0096] In some embodiments, the timer is also used to measure the start time of the start signal terminal when the vehicle key 401 is powered on and the start signal is triggered; the controller is also used to control the electronic fuel pump 403 to stop running when the start time exceeds the preset start time.

[0097] In this embodiment, the preset startup time can be configured according to different application scenarios, for example, according to the startup time length that the vehicle 400 usually requires.

[0098] It is understandable that although the start signal is triggered, the vehicle 400 may fail to start due to various reasons, so that the start signal is not disconnected after a period of time. Therefore, in this case, the electronic fuel pump 403 does not need to continue to operate, so the electronic fuel pump 403 can be controlled to stop operating.

[0099] In some embodiments, the vehicle 400 may also include: an oil storage device connected to one end of the electronic oil pump 403; an engine connected to the other end of the electronic oil pump 403 through an oil circuit; when the electronic oil pump 403 is running, the electronic oil pump 403 is used to transport the fuel in the oil storage device to the engine through the oil circuit.

[0100] Among them, the oil circuit can be used as mentioned above Figure 3 The implementation method of the low-pressure oil circuit shown includes: a hand oil pump, a low-pressure oil pump and other related components in sequence.

[0101] In some embodiments, the vehicle 400 may further include: an oil filter device, the oil filter device is connected to the oil storage device, and the electronic oil pump 403 is integrated on the oil filter device.

[0102] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0103] The word "exemplary" is used herein to indicate serving as an example, instance, or diagram. Any aspect or design described herein as "exemplary" is not necessarily understood to be advantageous compared to other aspects or designs. On the contrary, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to represent an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X applies A or B" is intended to represent any one of the natural inclusive arrangements. That is, if X applies A; X applies B; or X applies both A and B, "X applies A or B" is satisfied under any of the aforementioned examples. In addition, unless otherwise specified or clearly pointed to a singular form from the context, the articles "one" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0104] Likewise, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art after reading and understanding the specification and drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise indicated, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if the structure is not equivalent to the disclosed structure. In addition, although specific features of the present disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and beneficial to any given or specific application. In addition, with respect to "including", "having", "having", "having", or variations thereof used in a specific embodiment or claim, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0105] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0106] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0107] It should be understood that, unless otherwise specifically noted, the features of some embodiments of the various present disclosures described herein may be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more; similarly, "at least one of . . . " includes any one of the related listed items and any combination of any two or more.

[0108] It should be understood that, unless otherwise clearly specified and limited, the terms "joining", "attaching", "installing", "connecting", "connecting", "fixing" and the like used in the embodiments of the present disclosure should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0109] Although terms such as "first", "second" and "third" can be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. On the contrary, these terms are only used to distinguish one component, component, region, layer or section from another component, component, region, layer or section. Therefore, without departing from the teachings of each example, the first component, component, region, layer or section mentioned in the examples described herein may also be referred to as the second component, component, region, layer or section. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may expressly or implicitly include at least one of the features. In the description herein, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

Claims

1. A vehicle, characterized in that: include: Vehicle keys, control circuits and electronic fuel pumps; The vehicle key includes a power-on signal terminal and a start signal terminal; The control circuit is connected between the power-on signal terminal, the start signal terminal and the electronic oil pump; The electronic fuel pump operates via the control circuit when the vehicle key is powered on and a start signal is not triggered, continues to operate when the vehicle key is powered on and a start signal is triggered, and stops operating when the vehicle key is powered on and the start signal is disconnected.

2. The vehicle according to claim 1, characterized in that The control circuit includes a first relay, a second relay and a third relay; The control end of the first relay is connected to the power-on signal end, the first relay is used to close when the vehicle key is powered on and the start signal is not triggered and when the vehicle key is powered on and the start signal is triggered, and is used to open when the vehicle key is powered on and the start signal is disconnected; The control end of the second relay is connected to the start signal end, the switch end of the second relay is connected to the power-on signal end and to the control end of the first relay, the second relay is used to close when the vehicle key is powered on and the start signal is triggered, and is used to remain closed by self-locking when the vehicle key is powered on and the start signal is disconnected; The control end of the third relay is connected to the start signal end, the switch end of the third relay is connected to the switch end of the second relay, and the third relay is used to close when the vehicle key triggers the start signal, and to disconnect when the start signal is disconnected.

3. The vehicle according to claim 2, characterized in that The first relay is a normally open relay, the second relay is a double switch relay, and the third relay is a single switch relay.

4. The vehicle according to claim 2, characterized in that The first relay includes: a first control end, a second control end and a first switch, the first control end is connected to the power-on signal end, the second control end is connected to the switch end of the second relay, the first end of the first switch is connected to the power supply, and the second end of the first switch is connected to the electronic oil pump.

5. The vehicle according to claim 4, characterized in that The second relay includes: a third control terminal, a fourth control terminal, a second switch and a third switch, The third control terminal is connected to the start signal terminal, and the fourth control terminal is grounded; The common end of the second switch is connected to the second control end, the normally open end of the second switch is connected to the switch end of the third relay, and the normally closed end of the second switch is grounded; The common end of the third switch is connected to the power-on signal end, and the normally-open end of the third switch is connected to the start signal end.

6. The vehicle according to claim 5, characterized in that The third relay comprises: a fifth control terminal, a sixth control terminal and a fourth switch; The fifth control terminal is connected to the start signal terminal, and the sixth control terminal is grounded; A normally-open end of the fourth switch is grounded, and a common end of the fourth switch is connected to the normally-open end of the second switch.

7. The vehicle according to any one of claims 1 to 6, characterized in that: The vehicle further includes a timer, the timer being used to measure the power-on time of the power-on signal terminal when the vehicle key is powered on and the start signal is not triggered; The electronic oil pump comprises a controller, which is connected to the timer and is used for controlling the electronic oil pump to stop running when the power-on time exceeds a preset power-on time.

8. The vehicle according to claim 7, characterized in that The timer is also used to measure the start time of the start signal end when the vehicle key is powered on and the start signal is triggered; The controller is also used for controlling the electronic oil pump to stop running when the start time exceeds a preset start time.

9. The vehicle according to any one of claims 1 to 6, characterized in that: The vehicle further comprises: An oil storage device connected to one end of the electronic oil pump; The engine is connected to the other end of the electronic oil pump through an oil circuit; When the electronic fuel pump is in operation, the electronic fuel pump is used to deliver the fuel in the fuel storage device to the engine through the oil circuit.

10. The vehicle according to claim 9, characterized in that The vehicle further comprises: An oil filter device is connected to the oil storage device, and the electronic oil pump is integrated on the oil filter device.

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